>> reporter: the emotion just as raw as patty campbell remembered her daughter, 29-year-old krystle campbell, who also killed in the attack. >> she was a wonderful person. >> reporter: campbell reportedly left her job at a restaurant recently to take care of her ailing grandmother compounding the grief, the initial glimmer of hope when the family was first told krystle was alive, only to learn it was her friend who survived. >> she was all smiles. couldn't ask for a better daughter. >> reporter: and this morning new details are trickling in about the third victim, a boston university graduate student from china who had been watching the marathon with two friends when tragedy struck. the parents of the graduate student of china have not released her name yet because they haven't told her grandparents, saying they don't think that they can handle it. also of note, that restaurant where campbell worked, they closed it today in her honor. >> thanks very much. >>> we turn to another potential terrorism scare out of washington. a letter mailed to a mississippi senator has tested positive for the d